Otterbox unveiled its Defender Series case today for the iPhone 4. Otterbox Defender is a rugged case that also includes a Impact Series and Commuter Series cases are coming soon. Here is more info on the Otterbox Defender case for the iPhone 4:

Now available, the original multi-layer case provides the most rugged protection available for the iPhone 4. First, a polycarbonate shell made of hi-impact, shatter-resistant material is installed. Built into the shell is a clear Multi-Touch display screen cover as well as a clear cover for the Apple logo cutout on the backside. Finally, a silicone skin wraps around and locks into the shell resulting in a unified, nearly indestructible solution. Also included is a holster-style swivel belt clip.

The black OtterBox Defender Series case for the Apple iPhone 4 has been officially NAC tested to address the loss in signal strength. Test results indicate this case solves the antenna issue by acting as a dielectric between the two antennas of the device. No loss of signal strength occurs when using the iPhone 4 in a Defender Series case.

Coming soon, the OtterBox Commuter Series case features two layers of device security for a completely new level of innovation. A silicone mid-layer and a polycarbonate shell combine to provide protection from bump and shock, while the self-adhering screen protector defends from scratching. Similar to the Impact Series, the Commuter Series will offer coverage for the iPhone 4 power button, volume rocker and home button. Additionally, this line provides silicone plugs for the charging port and headphone jack that flip open for access. Customers can sign up online to receive notification about case availability.

All cases will accommodate every feature of the iPhone 4 with tight precision including proximity sensors, ambient light sensors, secondary mics and speakers. For full technical specifications for each series, visit the product pages at www.otterbox.com/iphone-cases/iphone-4-cases/